If epithelial cells are classified according to their cell shape, the classes would include :

Options

A. simple, stratified, pseudostratified
B. squamous, cuboidal, columnar
C. simple, squamous, stratified
D. pseudostratified, stratified, columnar

Answer

To classify epithelial cells according to their cell shape, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Classification of Epithelial Cells**: Epithelial tissues can be classified based on three main criteria: cell shape, number of layers, and function. Here, we focus on cell shape.

2. **Identify the Types of Cell Shapes**:
- **Squamous Cells**: These cells are flat and thin, resembling scales or tiles. They are often referred to as pavement epithelium due to their appearance.
- **Cuboidal Cells**: These cells are cube-shaped, with equal height, width, and depth. They are typically found in glandular tissues.
- **Columnar Cells**: These cells are taller than they are wide, resembling columns or pillars. They often line the digestive tract and are involved in absorption and secretion.

3. **Evaluate the Options Given**:
- **Option 1**: Simple, stratified, and pseudostratified - This classification is based on the number of layers, not cell shape.
- **Option 2**: Squamous, cuboidal, and columnar - This option correctly lists the three main shapes of epithelial cells.
- **Option 3**: Simple squamous and stratified - This option combines cell shape with the number of layers, which is not what the question asks.
- **Option 4**: Pseudostratified, stratified, and columnar - This option also mixes cell shape with the number of layers.

4. **Select the Correct Answer**: Based on the analysis, the correct classification of epithelial cells according to their shape is **Option 2: Squamous, Cuboidal, and Columnar**.

### Final Answer:
The classes of epithelial cells classified according to their cell shape would include: **Squamous, Cuboidal, and Columnar**.

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